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Contingencies and Commitments - Asbestos Litigation Activity (Details) (Asbestos Matters)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Claim_Group
LegalMatter
Dec. 31, 2014
Claim_Group
Dec. 31, 2013
Claim_Group
Dec. 31, 2012
Claim_Group
Asbestos Matters
       
Loss Contingency Accrual [Roll Forward]        
Opening Number of Claims 3,455us-gaap_LossContingencyPendingClaimsNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
3,320us-gaap_LossContingencyPendingClaimsNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
3,330us-gaap_LossContingencyPendingClaimsNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
3,235us-gaap_LossContingencyPendingClaimsNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
New Claims 75us-gaap_LossContingencyNewClaimsFiledNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
325us-gaap_LossContingencyNewClaimsFiledNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
240us-gaap_LossContingencyNewClaimsFiledNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
285us-gaap_LossContingencyNewClaimsFiledNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
Claims Dismissed, Settled and Resolved 110us-gaap_LossContingencyClaimsSettledAndDismissedNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
190us-gaap_LossContingencyClaimsSettledAndDismissedNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
250us-gaap_LossContingencyClaimsSettledAndDismissedNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
190us-gaap_LossContingencyClaimsSettledAndDismissedNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
Closing Number of Claims 2,540us-gaap_LossContingencyPendingClaimsNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
3,455us-gaap_LossContingencyPendingClaimsNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
3,320us-gaap_LossContingencyPendingClaimsNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember
3,330us-gaap_LossContingencyPendingClaimsNumber
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_AsbestosIssueMember